City: from Courier Boy to Billionaire!

Sun Hao is a courier who was accidentally bound to the god-level express delivery system. "Hey, the system is going to rest. Please come back in three days!". Three days later. "Boom, there is an unknown failure in the system. Please come back in six months!". Six months later. "Boom, there is an unknown error in the system. Please come back in twelve years!". Twelve years later. "Congratulations to the host, you have successfully activated the plus version of the god-level express delivery system." "Now, we will send you back to the original time and space twelve years, six months and three days ago!". Sun Hao clenched his fists tightly, his eyes glowing with bear light. "There is a saying: a gentleman's revenge is never too late." "My grandson is finally back!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.